Urea combustion synthesis of LiNi0.5Mn1.5O4 as a cathode material for lithium ion batteries--颗粒学报PARTICUOLOGY

Yang, K., Su, J., Zhang, L., Long, Y., Lv, X., & Wen, Y. (2012). Urea combustion synthesis of LiNi0.5Mn1.5O4 as a cathode material for lithium ion batteries. Particuology, 10(6), 765–770. https://doi.org/10.1016/j.partic.2011.12.003

Urea combustion synthesis of LiNi_0.5Mn_1.5O₄ as a cathode material for lithium ion batteries

Kedi Yang ^a, Jing Su ^a, Li Zhang ^a, Yunfei Long ^a, Xiaoyan Lv ^b, Yanxuan Wen ^a *

a School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
b Educational Administration Department, Guangxi University, Nanning 530004, China

10.1016/j.partic.2011.12.003

Volume 10, Issue 6, December 2012, Pages 765-770

Received 21 October 2011, Revised 15 December 2011, Accepted 19 December 2011, Available online 21 April 2012.

E-mail: wenyanxuan@vip.163.com

Highlights

► LiNi_0.5Mn_1.5O₄ with cubic spinel structure was synthesized by urea combustion synthesis.

► The structure and particle-size of LiNi_0.5Mn_1.5O₄ can be adjusted by the amount of urea and heat-treatment temperature.

► LiNi_0.5Mn_1.5O₄ shows the largest discharge capacity of 133.6 mAh/g and capacity retention rate of 99.6% after 20 cycles.

Abstract

LiNi_0.5Mn_1.5O₄ was synthesized by combustion synthesis (UCS) using urea as fuel. X-ray diffraction and scanning electron microscope measurements showed that the spinel structure LiNi_0.5Mn_1.5O₄ with the space group was formed during urea combustion. Both structure and particle size could be adjusted by the amount of urea and the heat treatment temperature used in the UCS. For the LiNi_0.5Mn_1.5O₄ sample prepared with a urea/Li molar ratio of 0.57 and a heat treatment temperature of 900 °C, the particle-size distribution fell in a narrow range of 1–2 μm. Electrochemical tests indicated that this LiNi_0.5Mn_1.5O₄ sample delivered a discharge capacity of 133.6 mAh/g with a capacity retention rate of 99.6% after 20 cycles at 0.5 C.

Graphical abstract

Keywords

Lithium ion battery; Cathode materials; LiNi_0.5Mn_1.5O₄; Urea combustion synthesis

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